Use the sample data and confidence level given below to complete parts​ (a) through​ (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the​ poll, n equals 1046n=1046 and x equals 502x=502 who said​ "yes." Use a 99 %99% confidence level. LOADING... Click the icon to view a table of z scores. Question content area bottom Part 1 ​a) Find the best point estimate of the population proportion p. 0.4800.480 ​(Round to three decimal places as​ needed.) Part 2 ​b) Identify the value of the margin of error E. Eequals=0.0280.028 ​(Round to three decimal places as​ needed.)